protected override void OnStartup(StartupEventArgs e) { ViewDriver viewDriver = new ViewDriver(); ViewDriverProvider.ViewDriver = viewDriver; FrameworkElement.LanguageProperty.OverrideMetadata( typeof(FrameworkElement), new FrameworkPropertyMetadata( XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag))); //CollectionViewProvider.Provider = CollectionViewSource.GetDefaultView; CollectionViewProvider.Provider = _provider; Tva.Value = double.Parse(ConfigurationManager.AppSettings["Tva"], CultureInfo.CreateSpecificCulture("en-US")); Window loginWindow = new LoginView(); loginWindow.WindowStartupLocation = WindowStartupLocation.CenterScreen; loginWindow.Show(); }